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            <h1 id="seo-header">vue+threejs+cannon-es实现物理效果</h1>
            
            
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                <h1 id="一、创建vue项目"><a href="#一、创建vue项目" class="headerlink" title="一、创建vue项目"></a>一、创建vue项目</h1><figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><code class="hljs sh">vue create <span class="hljs-built_in">test</span><br><span class="hljs-comment"># (选 Manually select features， 加上Router)</span><br></code></pre></td></tr></table></figure>
<p><img src="/img/three/vue-init.png" srcset="/img/loading.gif" lazyload alt="vue-init" title="vue-init"></p>
<figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><code class="hljs sh"><span class="hljs-built_in">cd</span> <span class="hljs-built_in">test</span><br>npm run serve<br></code></pre></td></tr></table></figure>

<h1 id="二、初始化threejs"><a href="#二、初始化threejs" class="headerlink" title="二、初始化threejs"></a>二、初始化threejs</h1><h2 id="1、安装"><a href="#1、安装" class="headerlink" title="1、安装"></a>1、安装</h2><figure class="highlight sh"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><code class="hljs sh">npm i three -s<br>npm i cannon-es -s<br></code></pre></td></tr></table></figure>

<h2 id="2、编写threejs测试页面"><a href="#2、编写threejs测试页面" class="headerlink" title="2、编写threejs测试页面"></a>2、编写threejs测试页面</h2><h3 id="添加路由-router-index-js"><a href="#添加路由-router-index-js" class="headerlink" title="添加路由 router&#x2F;index.js"></a>添加路由 router&#x2F;index.js</h3><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><code class="hljs js">&#123;<br>	<span class="hljs-attr">path</span>: <span class="hljs-string">&#x27;/threeDemo&#x27;</span>,<br>	<span class="hljs-attr">name</span>: <span class="hljs-string">&#x27;threeDemo&#x27;</span>,<br>	<span class="hljs-attr">component</span>: <span class="hljs-function">() =&gt;</span> <span class="hljs-keyword">import</span>(<span class="hljs-string">&#x27;../views/ThreeDemoView.vue&#x27;</span>)<br>&#125;,<br></code></pre></td></tr></table></figure>

<h3 id="编写页面-views-ThreeDemoView-vue"><a href="#编写页面-views-ThreeDemoView-vue" class="headerlink" title="编写页面 views&#x2F;ThreeDemoView.vue"></a>编写页面 views&#x2F;ThreeDemoView.vue</h3><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span 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class="line">206</span><br><span class="line">207</span><br><span class="line">208</span><br></pre></td><td class="code"><pre><code class="hljs html"><span class="hljs-tag">&lt;<span class="hljs-name">template</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">id</span>=<span class="hljs-string">&quot;threeDemo&quot;</span>&gt;</span><br>    <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">template</span>&gt;</span><br><br><span class="hljs-tag">&lt;<span class="hljs-name">script</span>&gt;</span><span class="language-javascript"></span><br><span class="language-javascript"><span class="hljs-keyword">import</span> * <span class="hljs-keyword">as</span> <span class="hljs-variable constant_">THREE</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;three&#x27;</span></span><br><span class="language-javascript"><span class="hljs-keyword">import</span> &#123; <span class="hljs-title class_">GLTFLoader</span> &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;three/examples/jsm/loaders/GLTFLoader.js&#x27;</span></span><br><span class="language-javascript"><span class="hljs-keyword">import</span> &#123; <span class="hljs-title class_">OrbitControls</span> &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;three/examples/jsm/controls/OrbitControls&#x27;</span></span><br><span class="language-javascript"><span class="hljs-keyword">import</span> * <span class="hljs-keyword">as</span> <span class="hljs-variable constant_">CANNON</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;cannon-es&#x27;</span></span><br><span class="language-javascript"><span class="hljs-keyword">import</span> &#123; <span class="hljs-title class_">DRACOLoader</span> &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;three/examples/jsm/loaders/DRACOLoader&#x27;</span></span><br><span class="language-javascript"><span class="hljs-keyword">let</span> scene, camera, world, sphere, sphereBody, mixer,</span><br><span class="language-javascript">    controls, renderer</span><br><span class="language-javascript"><span class="hljs-keyword">const</span> clock = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">Clock</span>()</span><br><span class="language-javascript"><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> &#123;</span><br><span class="language-javascript">    <span class="hljs-attr">name</span>: <span class="hljs-string">&#x27;HelloWorld&#x27;</span>,</span><br><span class="language-javascript">    <span class="hljs-attr">methods</span>: &#123;</span><br><span class="language-javascript">    init () &#123;</span><br><span class="language-javascript">        <span class="hljs-comment">// 创建物理世界</span></span><br><span class="language-javascript">        world = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">World</span>()</span><br><span class="language-javascript">        world.<span class="hljs-property">gravity</span>.<span class="hljs-title function_">set</span>(<span class="hljs-number">0</span>, -<span class="hljs-number">9.8</span>, <span class="hljs-number">0</span>)</span><br><span class="language-javascript">        <span class="hljs-comment">// 创建物理小球形状</span></span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> sphereShape = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Sphere</span>(<span class="hljs-number">1</span>)</span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> concreteMaterial = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Material</span>(<span class="hljs-string">&#x27;concrete&#x27;</span>) <span class="hljs-comment">// 创建混凝土材质</span></span><br><span class="language-javascript">        <span class="hljs-comment">// 设置物体材质</span></span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> sphereWorldMaterial = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Material</span>(<span class="hljs-string">&#x27;plastic&#x27;</span>) <span class="hljs-comment">// 创建塑料材质</span></span><br><span class="language-javascript">        <span class="hljs-comment">// 创建物理世界的物体</span></span><br><span class="language-javascript">        sphereBody = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Body</span>(&#123;</span><br><span class="language-javascript">        <span class="hljs-attr">shape</span>: sphereShape,</span><br><span class="language-javascript">        <span class="hljs-comment">// 位置</span></span><br><span class="language-javascript">        <span class="hljs-attr">position</span>: <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Vec3</span>(<span class="hljs-number">0</span>, <span class="hljs-number">5</span>, <span class="hljs-number">0</span>),</span><br><span class="language-javascript">        <span class="hljs-comment">// 小球质量</span></span><br><span class="language-javascript">        <span class="hljs-attr">mass</span>: <span class="hljs-number">1</span>,</span><br><span class="language-javascript">        <span class="hljs-comment">// 物体材质</span></span><br><span class="language-javascript">        <span class="hljs-attr">material</span>: sphereWorldMaterial</span><br><span class="language-javascript">        &#125;)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">// 添加外力，这有点类似于风力一样，在某个位置向某物吹风</span></span><br><span class="language-javascript">        <span class="hljs-comment">// 该方法接收两个参数：force：力的大小(Vec3)  relativePoint：相对于质心施加力的点(Vec3)。</span></span><br><span class="language-javascript">        sphereBody.<span class="hljs-title function_">applyForce</span>(<span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Vec3</span>(<span class="hljs-number">100</span>, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>), sphereBody.<span class="hljs-property">position</span>)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">// 将物体添加至物理世界</span></span><br><span class="language-javascript">        world.<span class="hljs-title function_">addBody</span>(sphereBody)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">// 创建地面</span></span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> floorShape = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Plane</span>()</span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> floorBody = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Body</span>()</span><br><span class="language-javascript">        <span class="hljs-comment">// 当质量为0时，使得物体保持不动</span></span><br><span class="language-javascript">        floorBody.<span class="hljs-property">mass</span> = <span class="hljs-number">0</span></span><br><span class="language-javascript">        floorBody.<span class="hljs-title function_">addShape</span>(floorShape)</span><br><span class="language-javascript">        <span class="hljs-comment">// 位置</span></span><br><span class="language-javascript">        floorBody.<span class="hljs-property">position</span>.<span class="hljs-title function_">set</span>(<span class="hljs-number">0</span>, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>)</span><br><span class="language-javascript">        <span class="hljs-comment">// 旋转</span></span><br><span class="language-javascript">        floorBody.<span class="hljs-property">quaternion</span>.<span class="hljs-title function_">setFromAxisAngle</span>(<span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">Vec3</span>(<span class="hljs-number">1</span>, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>), -<span class="hljs-title class_">Math</span>.<span class="hljs-property">PI</span> / <span class="hljs-number">2</span>)</span><br><span class="language-javascript">        floorBody.<span class="hljs-property">material</span> = concreteMaterial<span class="hljs-comment">// 设置材质</span></span><br><span class="language-javascript">        world.<span class="hljs-title function_">addBody</span>(floorBody)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">/**</span></span><br><span class="hljs-comment"><span class="language-javascript">        * 设置两种材质相交时的效果  相当于设置两种材质碰撞时应该展示什么样的效果 例如：篮球在地板上反弹</span></span><br><span class="hljs-comment"><span class="language-javascript">        */</span></span><br><span class="language-javascript">        <span class="hljs-comment">// 创建一个接触材质</span></span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> concretePlasticMaterial = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">CANNON</span>.<span class="hljs-title class_">ContactMaterial</span>(</span><br><span class="language-javascript">        concreteMaterial, <span class="hljs-comment">// 材质1</span></span><br><span class="language-javascript">        sphereWorldMaterial, <span class="hljs-comment">// 材质2</span></span><br><span class="language-javascript">        &#123;</span><br><span class="language-javascript">            <span class="hljs-attr">friction</span>: <span class="hljs-number">0.1</span>, <span class="hljs-comment">// 摩擦力</span></span><br><span class="language-javascript">            <span class="hljs-attr">restitution</span>: <span class="hljs-number">0.7</span> <span class="hljs-comment">// 反弹力</span></span><br><span class="language-javascript">        &#125;</span><br><span class="language-javascript">        )</span><br><span class="language-javascript">        <span class="hljs-comment">// 添加接触材质配置</span></span><br><span class="language-javascript">        world.<span class="hljs-title function_">addContactMaterial</span>(concretePlasticMaterial)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        scene = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">Scene</span>()</span><br><span class="language-javascript">        camera = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">PerspectiveCamera</span>(<span class="hljs-number">75</span>, <span class="hljs-variable language_">window</span>.<span class="hljs-property">innerWidth</span> / <span class="hljs-variable language_">window</span>.<span class="hljs-property">innerHeight</span>, <span class="hljs-number">0.1</span>, <span class="hljs-number">1000</span>)</span><br><span class="language-javascript">        camera.<span class="hljs-property">position</span>.<span class="hljs-title function_">set</span>(<span class="hljs-number">0</span>, <span class="hljs-number">5</span>, <span class="hljs-number">5</span>)</span><br><span class="language-javascript">        renderer = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">WebGLRenderer</span>(&#123; <span class="hljs-attr">antialias</span>: <span class="hljs-literal">true</span> &#125;)</span><br><span class="language-javascript">        <span class="hljs-keyword">var</span> ambientLight = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">AmbientLight</span>(<span class="hljs-number">0x523318</span>)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        scene.<span class="hljs-title function_">add</span>(ambientLight)</span><br><span class="language-javascript">        sphere = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">Mesh</span>(</span><br><span class="language-javascript">        <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">SphereGeometry</span>(<span class="hljs-number">1</span>, <span class="hljs-number">20</span>, <span class="hljs-number">20</span>),</span><br><span class="language-javascript">        <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">MeshStandardMaterial</span>(&#123; <span class="hljs-attr">color</span>: <span class="hljs-number">0xffff00</span> &#125;)</span><br><span class="language-javascript">        )</span><br><span class="language-javascript">        sphere.<span class="hljs-property">position</span>.<span class="hljs-property">y</span> = <span class="hljs-number">5</span></span><br><span class="language-javascript">        sphere.<span class="hljs-property">castShadow</span> = <span class="hljs-literal">true</span></span><br><span class="language-javascript">        scene.<span class="hljs-title function_">add</span>(sphere)</span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> floor = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">Mesh</span>(</span><br><span class="language-javascript">        <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">PlaneGeometry</span>(<span class="hljs-number">20</span>, <span class="hljs-number">20</span>),</span><br><span class="language-javascript">        <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">MeshStandardMaterial</span>(&#123; <span class="hljs-attr">color</span>: <span class="hljs-number">0xdddddd</span> &#125;)</span><br><span class="language-javascript">        )</span><br><span class="language-javascript">        floor.<span class="hljs-property">position</span>.<span class="hljs-property">y</span> = <span class="hljs-number">0</span></span><br><span class="language-javascript">        floor.<span class="hljs-property">rotation</span>.<span class="hljs-property">x</span> = -<span class="hljs-title class_">Math</span>.<span class="hljs-property">PI</span> / <span class="hljs-number">2</span></span><br><span class="language-javascript">        floor.<span class="hljs-property">receiveShadow</span> = <span class="hljs-literal">true</span></span><br><span class="language-javascript">        scene.<span class="hljs-title function_">add</span>(floor)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> gltfLoader = <span class="hljs-keyword">new</span> <span class="hljs-title class_">GLTFLoader</span>()</span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> dracoLoader = <span class="hljs-keyword">new</span> <span class="hljs-title class_">DRACOLoader</span>()</span><br><span class="language-javascript">        dracoLoader.<span class="hljs-title function_">setDecoderPath</span>(<span class="hljs-string">&#x27;./assets/&#x27;</span>) <span class="hljs-comment">// 设置public下的解码路径，注意最后面的/</span></span><br><span class="language-javascript">        gltfLoader.<span class="hljs-title function_">setDRACOLoader</span>(dracoLoader)</span><br><span class="language-javascript">        gltfLoader.<span class="hljs-title function_">load</span>(<span class="hljs-string">&#x27;/3d/gltf/eve.glb&#x27;</span>, <span class="hljs-function">(<span class="hljs-params">gltf</span>) =&gt;</span> &#123;</span><br><span class="language-javascript">        <span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(gltf)</span><br><span class="language-javascript">        gltf.<span class="hljs-property">scene</span>.<span class="hljs-title function_">traverse</span>(<span class="hljs-keyword">function</span> (<span class="hljs-params">object</span>) &#123;</span><br><span class="language-javascript">            <span class="hljs-keyword">if</span> (object.<span class="hljs-property">isMesh</span>) &#123;</span><br><span class="language-javascript">            object.<span class="hljs-property">castShadow</span> = <span class="hljs-literal">true</span> <span class="hljs-comment">// 阴影</span></span><br><span class="language-javascript">            object.<span class="hljs-property">receiveShadow</span> = <span class="hljs-literal">true</span> <span class="hljs-comment">// 接受别人投的阴影</span></span><br><span class="language-javascript">            &#125;</span><br><span class="language-javascript">        &#125;)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">// 使用动画混合器及配置</span></span><br><span class="language-javascript">        mixer = <span class="hljs-variable language_">this</span>.<span class="hljs-title function_">startAnimation</span>(</span><br><span class="language-javascript">            gltf.<span class="hljs-property">scene</span>,</span><br><span class="language-javascript">            gltf.<span class="hljs-property">animations</span>,</span><br><span class="language-javascript">            gltf.<span class="hljs-property">animations</span>[<span class="hljs-number">2</span>].<span class="hljs-property">name</span> <span class="hljs-comment">// animationName，这里是&quot;Run&quot;</span></span><br><span class="language-javascript">        )</span><br><span class="language-javascript"></span><br><span class="language-javascript">        scene.<span class="hljs-title function_">add</span>(gltf.<span class="hljs-property">scene</span>)</span><br><span class="language-javascript">        &#125;)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">// 平行光</span></span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> directionalLight = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">DirectionalLight</span>(<span class="hljs-number">0xFFFFFF</span>)</span><br><span class="language-javascript">        directionalLight.<span class="hljs-property">castShadow</span> = <span class="hljs-literal">true</span></span><br><span class="language-javascript">        directionalLight.<span class="hljs-property">shadow</span>.<span class="hljs-property">camera</span>.<span class="hljs-property">near</span> = <span class="hljs-number">0.5</span></span><br><span class="language-javascript">        directionalLight.<span class="hljs-property">shadow</span>.<span class="hljs-property">camera</span>.<span class="hljs-property">far</span> = <span class="hljs-number">50</span></span><br><span class="language-javascript">        directionalLight.<span class="hljs-property">shadow</span>.<span class="hljs-property">camera</span>.<span class="hljs-property">left</span> = -<span class="hljs-number">10</span></span><br><span class="language-javascript">        directionalLight.<span class="hljs-property">shadow</span>.<span class="hljs-property">camera</span>.<span class="hljs-property">right</span> = <span class="hljs-number">10</span></span><br><span class="language-javascript">        directionalLight.<span class="hljs-property">shadow</span>.<span class="hljs-property">camera</span>.<span class="hljs-property">top</span> = <span class="hljs-number">10</span></span><br><span class="language-javascript">        directionalLight.<span class="hljs-property">shadow</span>.<span class="hljs-property">camera</span>.<span class="hljs-property">bottom</span> = -<span class="hljs-number">10</span></span><br><span class="language-javascript">        directionalLight.<span class="hljs-property">position</span>.<span class="hljs-title function_">set</span>(<span class="hljs-number">0</span>, <span class="hljs-number">20</span>, <span class="hljs-number">20</span>)</span><br><span class="language-javascript">        scene.<span class="hljs-title function_">add</span>(directionalLight)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">// 用于模拟场景中平行光 DirectionalLight 的辅助对象. 其中包含了表示光位置的平面和表示光方向的线段.</span></span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> directionalLightHelper = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">DirectionalLightHelper</span>(directionalLight, <span class="hljs-number">5</span>)</span><br><span class="language-javascript">        scene.<span class="hljs-title function_">add</span>(directionalLightHelper)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        camera.<span class="hljs-title function_">lookAt</span>(scene.<span class="hljs-property">position</span>)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">// 增加坐标系红色代表 X 轴. 绿色代表 Y 轴. 蓝色代表 Z 轴.</span></span><br><span class="language-javascript">        <span class="hljs-comment">// 添加坐标系到场景中</span></span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> axes = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">AxesHelper</span>(<span class="hljs-number">20</span>)</span><br><span class="language-javascript">        scene.<span class="hljs-title function_">add</span>(axes)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        renderer.<span class="hljs-property">shadowMap</span>.<span class="hljs-property">enabled</span> = <span class="hljs-literal">true</span></span><br><span class="language-javascript">        renderer.<span class="hljs-title function_">setPixelRatio</span>(<span class="hljs-variable language_">window</span>.<span class="hljs-property">devicePixelRatio</span>)</span><br><span class="language-javascript">        renderer.<span class="hljs-title function_">setSize</span>(<span class="hljs-variable language_">window</span>.<span class="hljs-property">innerWidth</span>, <span class="hljs-variable language_">window</span>.<span class="hljs-property">innerHeight</span>)</span><br><span class="language-javascript">        <span class="hljs-variable language_">document</span>.<span class="hljs-title function_">getElementById</span>(<span class="hljs-string">&#x27;threeDemo&#x27;</span>).<span class="hljs-title function_">appendChild</span>(renderer.<span class="hljs-property">domElement</span>)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        controls = <span class="hljs-keyword">new</span> <span class="hljs-title class_">OrbitControls</span>(camera, renderer.<span class="hljs-property">domElement</span>)</span><br><span class="language-javascript">        controls.<span class="hljs-property">maxPolarAngle</span> = <span class="hljs-title class_">Math</span>.<span class="hljs-property">PI</span> * <span class="hljs-number">0.495</span></span><br><span class="language-javascript">        <span class="hljs-comment">// controls.target.set( 0, 10, 0 )</span></span><br><span class="language-javascript">        controls.<span class="hljs-property">minDistance</span> = <span class="hljs-number">1.0</span></span><br><span class="language-javascript">        controls.<span class="hljs-property">maxDistance</span> = <span class="hljs-number">200.0</span></span><br><span class="language-javascript">        controls.<span class="hljs-title function_">update</span>()</span><br><span class="language-javascript">        controls.<span class="hljs-property">enableDamping</span> = <span class="hljs-literal">true</span></span><br><span class="language-javascript">    &#125;,</span><br><span class="language-javascript">    animate () &#123;</span><br><span class="language-javascript">        world.<span class="hljs-title function_">fixedStep</span>() <span class="hljs-comment">// 动态更新world</span></span><br><span class="language-javascript">        sphere.<span class="hljs-property">position</span>.<span class="hljs-title function_">copy</span>(sphereBody.<span class="hljs-property">position</span>)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-comment">// 更新动画帧</span></span><br><span class="language-javascript">        <span class="hljs-keyword">if</span> (mixer) &#123;</span><br><span class="language-javascript">        mixer.<span class="hljs-title function_">update</span>(clock.<span class="hljs-title function_">getDelta</span>())</span><br><span class="language-javascript">        &#125;</span><br><span class="language-javascript">        renderer.<span class="hljs-title function_">render</span>(scene, camera)</span><br><span class="language-javascript">        controls.<span class="hljs-title function_">update</span>()</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-title function_">requestAnimationFrame</span>(<span class="hljs-variable language_">this</span>.<span class="hljs-property">animate</span>)</span><br><span class="language-javascript">    &#125;,</span><br><span class="language-javascript">    <span class="hljs-comment">/**</span></span><br><span class="hljs-comment"><span class="language-javascript">        * 启动特定网格对象的动画。在三维模型的动画数组中按名称查找动画</span></span><br><span class="hljs-comment"><span class="language-javascript">        * <span class="hljs-doctag">@param</span> skinnedMesh &#123;THREE.SkinnedMesh&#125; 要设置动画的网格</span></span><br><span class="hljs-comment"><span class="language-javascript">        * <span class="hljs-doctag">@param</span> animations &#123;Array&#125; 数组，包含此模型的所有动画</span></span><br><span class="hljs-comment"><span class="language-javascript">        * <span class="hljs-doctag">@param</span> animationName &#123;string&#125; 要启动的动画的名称</span></span><br><span class="hljs-comment"><span class="language-javascript">        * <span class="hljs-doctag">@return</span> &#123;<span class="hljs-type">THREE.AnimationMixer</span>&#125; 要在渲染循环中使用的混合器</span></span><br><span class="hljs-comment"><span class="language-javascript">        */</span></span><br><span class="language-javascript">    startAnimation (skinnedMesh, animations, animationName) &#123;</span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> mixer = <span class="hljs-keyword">new</span> <span class="hljs-variable constant_">THREE</span>.<span class="hljs-title class_">AnimationMixer</span>(skinnedMesh)</span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> clip = <span class="hljs-variable constant_">THREE</span>.<span class="hljs-property">AnimationClip</span>.<span class="hljs-title function_">findByName</span>(animations, animationName)</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-keyword">if</span> (clip) &#123;</span><br><span class="language-javascript">        <span class="hljs-keyword">const</span> action = mixer.<span class="hljs-title function_">clipAction</span>(clip)</span><br><span class="language-javascript">        action.<span class="hljs-title function_">play</span>()</span><br><span class="language-javascript">        &#125;</span><br><span class="language-javascript"></span><br><span class="language-javascript">        <span class="hljs-keyword">return</span> mixer</span><br><span class="language-javascript">    &#125;</span><br><span class="language-javascript">    &#125;,</span><br><span class="language-javascript">    mounted () &#123;</span><br><span class="language-javascript">    <span class="hljs-variable language_">this</span>.<span class="hljs-title function_">init</span>()</span><br><span class="language-javascript">    <span class="hljs-variable language_">this</span>.<span class="hljs-title function_">animate</span>()</span><br><span class="language-javascript">    <span class="hljs-variable language_">window</span>.<span class="hljs-title function_">addEventListener</span>(<span class="hljs-string">&#x27;resize&#x27;</span>, <span class="hljs-function">() =&gt;</span> &#123;</span><br><span class="language-javascript">        camera.<span class="hljs-property">aspect</span> = <span class="hljs-variable language_">window</span>.<span class="hljs-property">innerWidth</span> / <span class="hljs-variable language_">window</span>.<span class="hljs-property">innerHeight</span></span><br><span class="language-javascript">        camera.<span class="hljs-title function_">updateProjectionMatrix</span>()</span><br><span class="language-javascript">        renderer.<span class="hljs-title function_">setPixelRatio</span>(<span class="hljs-variable language_">window</span>.<span class="hljs-property">devicePixelRatio</span>)</span><br><span class="language-javascript">        renderer.<span class="hljs-title function_">setSize</span>(<span class="hljs-variable language_">window</span>.<span class="hljs-property">innerWidth</span>, <span class="hljs-variable language_">window</span>.<span class="hljs-property">innerHeight</span>)</span><br><span class="language-javascript">    &#125;)</span><br><span class="language-javascript">    &#125;</span><br><span class="language-javascript">&#125;</span><br><span class="language-javascript"></span><br><span class="language-javascript"></span><span class="hljs-tag">&lt;/<span class="hljs-name">script</span>&gt;</span><br>### App.vue 添加请求链接<br><span class="hljs-tag">&lt;<span class="hljs-name">template</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">nav</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">router-link</span> <span class="hljs-attr">to</span>=<span class="hljs-string">&quot;/&quot;</span>&gt;</span>Home<span class="hljs-tag">&lt;/<span class="hljs-name">router-link</span>&gt;</span> |<br>    <span class="hljs-tag">&lt;<span class="hljs-name">router-link</span> <span class="hljs-attr">to</span>=<span class="hljs-string">&quot;/about&quot;</span>&gt;</span>About<span class="hljs-tag">&lt;/<span class="hljs-name">router-link</span>&gt;</span> |<br>    <span class="hljs-tag">&lt;<span class="hljs-name">router-link</span> <span class="hljs-attr">to</span>=<span class="hljs-string">&quot;/threeDemo&quot;</span>&gt;</span>threeDemo<span class="hljs-tag">&lt;/<span class="hljs-name">router-link</span>&gt;</span><br>    <span class="hljs-tag">&lt;/<span class="hljs-name">nav</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">router-view</span>/&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">template</span>&gt;</span><br></code></pre></td></tr></table></figure>
<h3 id="效果"><a href="#效果" class="headerlink" title="效果"></a>效果</h3><p><img src="/img/three/threeDemo.jpg" srcset="/img/loading.gif" lazyload alt="效果"></p>

                
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